ok so I got my new part (#21 52 2 333 162) from the good folks at New Century in Alhambra, CA (cheaper to get it from there than buying it from an Australian dealer plus they have no stock here in the country!) but they ripped me off charging 3x the postage!
I'm going to have a crack at fitting it myself - seems pretty straight forward (if i can only get the grip off!)
Easy to see why these fail - pretty flimsy mechanism esp if they dry out a bit - I just can't bear having a busted bit on the bike even though I don't really use it much..
